Table 1 Demographic characteristic of participants

Number of participants

110

90

-

Age (years)

60.89 ± 2.67

60.84 ± 2.46

0.89

Gender (male/female)

56/54

49/41

0.65

Weight (kg)

58.5 ± 8.7

59.2 ± 7.9

0.72

Body mass index (BMI, kg/m2)

22.8 ± 1.5

22.7 ± 1.6

0.81

Duration of osteoarthritis (years)

6.8 ± 2.3

6.5 ± 2.1

0.68

ASA class I/II (% participants)

65% / 35%

68% / 32%

0.57

Smoking status (% smokers)

28%

30%

0.78

Comorbidities

Hypertension

25%

27%

0.76

Diabetes mellitus

18%

20%

0.68

Coronary artery disease

12%

11%

0.89

Preoperative haemoglobin (g/dL)

13.6 ± 0.8

13.4 ± 0.9

0.43

Preoperative pain level (VAS)

6.8 ± 1.2

6.7 ± 1.1

0.85

Duration of symptoms (months)

72 ± 18

70 ± 16

0.74

Preoperative mobility

Able to walk independently (%)

60%

62%

0.71

Requires walking aid (%)

40%

38%

0.72

Preoperative sedation score (RSS)

1.9 ± 0.5

2.0 ± 0.4

0.81